A friend of Mr Chamberlain's found the lamb carcasses on Tuesday in Upper Waingawa Rd, near the Waingawa River, and alerted Mr Chamberlain.
Mr Chamberlain said he wanted other farmers to be more aware of people stealing stock. "Be observant and little things might help. I don't want to lose any more but what's to say they aren't going to come back and have another go?"
Mr Chamberlain said he was unhappy with the way police had handled the theft. He felt they had not done enough.
He said he had rung police after he discovered the lambs were missing and left his number but did not hear back for several days.
"There is something wrong in the police station when you can't get action when you have lost 23 lambs," Mr Chamberlin said.
"What I'm trying to do is alert the farmers that it's going on and the police don't seem that interested in farmers' problems."
Mr Chamberlain said he had increased his security since the theft.
Masterton Constable Andrew Stringer said the lamb carcasses were found dismembered.
"Some of them had their heads missing and some had their legs missing and things like that."
The area was notorious for stock theft. "There has been a lot. It's an annual thing, this time of year, when the lambs are really fat and due to be sold, so it's a prime opportunity for people to enter yards and take sheep," Mr Stringer said.
"It's a reminder for farmers that stock is often targeted over the November and December months."
Mr Stringer said it was important for farmers to take extra security precautions, particularly in semi-rural areas.
"From the police point of view it's just making people more aware to keep stock away from road yards and to at least lock, or chain, their gates to make things harder and just to be more vigilant."
Police are seeking witnesses to suspicious activity in the area and ask people contact the Masterton Police Station, on (06) 370 0300.
